when a man is playing strip poker, and he puts some kind of special effort into getting himself only slightly sexually aroused, so if he loses and has to take it all off, he'll have a semi and it will look like his penis in its flaccid state is bigger than it really is

"When Jeff was playing strip poker with us last night and ended up being down to his boxers, we noticed him discreetly tugging on his crotch area a couple of times while also seemingly taking some peeks at Kate's cleavage. I smirkingly whispered to him, 'you're giving yourself the Poker Fluff, aren't you?'"